Butterfly valve with limiting and adjusting functions

Abstract

The utility model belongs to the technical field of butterfly valves, and particularly discloses a butterfly valve with a limiting and adjusting function, which is used for solving the problems that the opening degree of the valve cannot be adaptively adjusted and the direct impact damage of a sealing end caused by fluid in a pipeline cannot be avoided. Comprising a valve body, a valve plate is rotationally installed in the valve body, and a flow guide groove with the diameter depth gradually reduced from inside to outside is formed in the valve plate; on one hand, diffusion type flow guiding after fluid impact is achieved through the flow guiding structure with the diameter depth gradually decreasing from inside to outside, and the problem that the valve is damaged or even fails in sealing due to over-stroke opening is avoided through limiting in valve opening adjustment; on the other hand, it is ensured that an operator accurately adjusts the opening degree of the valve through real-time opening degree display in the opening process of the valve; the matching of the two can effectively realize the opening adaptive adjustment and the sealing end protection of the butterfly valve in the use process.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a butterfly valve with limit adjustment function. Background Technology

[0002] As a commonly used shut-off and regulating device in fluid control systems, the accuracy of the closing position of butterfly valves is crucial for the normal operation of the system. However, traditional butterfly valves may overtravel during the closing process due to improper operation or external forces, leading to valve damage or sealing failure.

[0003] Referring to the content disclosed in patent publication number CN209762385U, it is used in pipelines to adjust the valve shaft end seal with a limiting cover, thereby maintaining the sealing performance of the valve sealing pair; however, in practical applications, if overtravel closure occurs during the long-term valve opening adjustment process, it will directly lead to valve damage or seal failure. Therefore, it has the following defects: it cannot make adaptive adjustments to the valve opening, and it cannot avoid the problem of direct impact damage to the sealing end caused by the fluid in the pipeline.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a butterfly valve with limit adjustment function to solve the problems of inability to adaptively adjust the valve opening and inability to avoid direct impact damage to the sealing end caused by fluid in the pipeline.

[0006] The objective of this utility model can be achieved through the following technical solution: a butterfly valve with a limit adjustment function, comprising a valve body, a valve plate rotatably mounted inside the valve body, a guide groove with a diameter and depth gradually decreasing from the inside to the outside being formed on the valve plate, a limit mechanism being provided on one side of the valve body corresponding to the valve plate, the limit mechanism including an adjusting seat connected to the end of the inner wall of the valve body, a threaded seat being installed in the inner middle of the adjusting seat, a limit rod in contact with the valve plate being rotatably mounted in the middle of the threaded seat; at least four sealing rings in contact with the inner wall of the valve body are installed on the outer periphery of the valve plate, and a sealing post that is interference-fitted with the inner wall of the valve body is embedded in the outer ring side of the sealing rings.

[0007] Preferably, a motor is provided on the outer side of the valve body corresponding to the valve plate, and a rotating shaft is installed at the output end of the motor, which extends into the valve body and connects to the valve plate.

[0008] Preferably, one end of the rotating shaft that passes through the valve body is connected to a follower rod, and an indicator frame is installed on the outer side of the valve body corresponding to the follower rod. An indicator plate is installed on the outer end of the indicator frame, and a swivel pin that fits against the indicator plate is sleeved on the outer side of the follower rod. An indicator needle facing the outer side of the indicator plate is installed at the front end of the swivel pin, and an angle line is opened at the outer edge of the outer side of the indicator plate.

[0009] Preferably, the portion of the adjusting seat corresponding to the threaded seat has a passage cavity for fluid passage, and guide platforms are provided on both sides of the lower end of the adjusting seat corresponding to the threaded seat.

[0010] Preferably, an adjusting rod is installed at the outer end of the limiting rod extending to the threaded seat, a locking ring is sleeved on the outer side of the limiting rod extending to the threaded seat, and the inner end of the limiting rod is rounded and contacts the valve plate.

[0011] Preferably, a fixed seat is installed on the outer side of the valve body corresponding to the follower rod, and the follower rod is rotatably connected to the fixed seat.

[0012] Preferably, the outer ring side of the valve plate is provided with an annular groove, and at least four sealing rings are engaged and matched with the annular groove and connected end to end. The annular groove is not connected to the guide groove.

[0013] The beneficial effects of this utility model are:

[0014] (1) On the one hand, this utility model achieves diffusion-type flow guidance after fluid impact through a flow guidance structure with the diameter and depth gradually decreasing from the inside to the outside, and avoids valve damage or even sealing failure caused by over-travel opening by limiting the valve opening adjustment; on the other hand, it ensures accurate valve opening adjustment by the operator through real-time opening display during valve opening process; the combination of the two can effectively realize the butterfly valve's opening adaptability adjustment and sealing end protection during use.

[0015] (2) After adding the limiting mechanism, the following measures are taken to reduce the obstruction generated during the fluid passage: the part of the adjusting seat corresponding to the threaded seat is provided with a passage cavity for the fluid passage, the lower end of the adjusting seat corresponding to the threaded seat is provided with a flow guide platform on both sides, the limiting rod extends to the outer end of the threaded seat and is equipped with an adjusting rod, the limiting rod extends to the outside of the threaded seat and is fitted with a locking screw ring, and the inner end of the limiting rod is rounded and in contact with the valve plate. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings;

[0017] Figure 1 This is a three-dimensional structural view of the entire utility model;

[0018] Figure 2This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 3 This is a side sectional view of the present invention;

[0020] Figure 4 This is a structural disassembly diagram of the valve plate of this utility model;

[0021] Figure 5 This is a cross-sectional view of the opening degree indicating mechanism of this utility model;

[0022] Figure 6 This is a structural breakdown diagram of the limiting mechanism of this utility model.

[0023] Legend: 1. Valve body; 2. Motor; 3. Indicator frame; 4. Valve plate; 5. Adjusting seat; 6. Limiting rod; 7. Indicator disc; 8. Guide groove; 9. Follower rod; 10. Locking screw ring; 11. Adjusting rod; 12. Sealing ring; 13. Passing cavity; 14. Annular groove; 15. Sealing column; 16. Angle line; 17. Fixed seat; 18. Swing needle; 19. Indicator needle; 20. Rotating shaft; 21. Threaded seat; 22. Guide platform. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: This example is used to solve the problems of being unable to adaptively adjust the valve opening and being unable to avoid direct impact damage to the sealing end caused by fluid in the pipeline.

[0026] Please see Figure 1 - Figure 6 As shown, this embodiment is a butterfly valve with limit adjustment function, including a valve body 1. A valve plate 4 is rotatably installed inside the valve body 1. A guide groove 8 with a diameter and depth gradually decreasing from the inside to the outside is opened on the valve plate 4. A limit mechanism is provided on one side of the valve body 1 corresponding to the valve plate 4. The limit mechanism includes an adjustment seat 5 connected to the end of the inner wall of the valve body 1. A threaded seat 21 is installed in the middle of the inner part of the adjustment seat 5. A limit rod 6 that contacts the valve plate 4 is rotatably installed in the middle of the threaded seat 21. At least four sealing rings 12 that contact the inner wall of the valve body 1 are installed on the outer periphery of the valve plate 4. A sealing post 15 that is interference-fitted with the inner wall of the valve body 1 is embedded in the outer ring side of the sealing rings 12. By setting at least four sealing rings 12, it is convenient to quickly replace the parts of the valve plate 4 that have failed to seal, so as to ensure the stable operation of the butterfly valve.

[0027] The outer ring side of the valve plate 4 is provided with an annular groove 14, and at least four sealing rings 12 are engaged and matched with the annular groove 14 and connected end to end. The annular groove 14 is not connected to the guide groove 8.

[0028] Basic principles: Please refer to Figure 1 - Figure 3 As shown, the structure of this utility model is basically similar to that of the butterfly valve in the prior art. The difference is that by setting the valve plate 4 to be sealed and encapsulated with the valve body 1, a seal is formed between the valve plate 4 and the valve body 1 through the cooperation of the sealing ring 12 and the sealing column 15. Even if the sealing failure occurs during long-term use, the valve plate 4 can be quickly replaced after disassembly. In addition, a limit rod 6 that can be flexibly adjusted in advance is set. The limit rod 6 limits the opening of the valve plate 4 during the adjustment process, thereby effectively preventing the over-travel closure problem caused by the valve plate 4 opening too far, and further avoiding valve damage or sealing failure.

[0029] Meanwhile, by opening a guide groove 8 on the valve plate 4 with a diameter and depth that gradually decreases from the inside to the outside, the fluid can be guided by diffusion after impact, thereby avoiding the sealing loss caused by direct impact to the sealing connection between the valve plate 4 and the valve body 1; with the cooperation of the two, the opening degree of the butterfly valve can be adjusted adaptively and the sealing end can be protected during use, reducing the limitations of the butterfly valve in use.

[0030] In addition, after adding the limiting mechanism, how to reduce the obstruction generated during the fluid passage is specifically as follows: the part of the adjusting seat 5 corresponding to the threaded seat 21 is provided with a passage cavity 13 for fluid passage, the lower end of the adjusting seat 5 corresponding to the threaded seat 21 is provided with a flow guide platform 22 on both sides, the limiting rod 6 extends to the outer end of the threaded seat 21 and is equipped with an adjusting rod 11, the limiting rod 6 extends to the outside of the threaded seat 21 and is fitted with a locking screw ring 10, the inner end of the limiting rod 6 is rounded and contacts the valve plate 4;

[0031] When the fluid passes through the valve body 1, the passage cavity 13 between the regulating seat 5 and the threaded seat 21 allows the fluid to pass smoothly. If the fluid impacts the threaded seat 21, the guide platform 22 at the bottom guides the fluid to avoid creating large obstacles that could cause eddies or even blockage of the fluid flow.

[0032] Example 2: In this example, the real-time opening degree of valve plate 4 is displayed synchronously during the valve opening adjustment process, as follows:

[0033] Please see Figure 2 , Figure 5As shown, the butterfly valve with limit adjustment function in this embodiment includes a motor 2 disposed on the outer side of the valve body 1 corresponding to the valve plate 4. A rotating shaft 20 is installed at the output end of the motor 2. The rotating shaft 20 extends into the valve body 1 and is connected to the valve plate 4. A follower rod 9 is connected to one end of the rotating shaft 20 that passes through the valve body 1. An indicator frame 3 is installed on the outer side of the valve body 1 corresponding to the follower rod 9. An indicator plate 7 is installed at the outer end of the indicator frame 3. A swing needle 18 that fits against the indicator plate 7 is sleeved on the outer side of the follower rod 9. An indicator needle 19 facing the outer side of the indicator plate 7 is installed at the front end of the swing needle 18. An angle line 16 is opened at the outer edge of the outer side of the indicator plate 7.

[0034] A fixed seat 17 is installed on the outer side of the valve body 1 corresponding to the follower rod 9. The follower rod 9 is rotatably connected to the fixed seat 17. The real-time rotation of the valve plate 4 is transmitted outward through the follower rod 9, so that the current rotation position of the valve plate 4 can be known in real time and the opening degree can be reflected.

[0035] Please see Figure 1 - Figure 5 As shown, during the valve plate 4 opening adjustment process, the motor 2 drives the valve plate 4 to rotate through the rotating shaft 20. During the rotation of the rotating shaft 20, the follower rod 9 is driven to rotate synchronously. At this time, the follower rod 9 drives the indicator needle 19 to rotate through the pendulum needle 18. That is, the indicator needle 19 indicates the scale line 16 on the indicator dial 7, thereby realizing the real-time display of the valve plate 4 opening during the valve opening adjustment process, which is convenient for the operator to adjust the valve opening.

[0036] Combining Embodiment 1 and Embodiment 2, on the one hand, the flow guiding structure with a diameter and depth gradually decreasing from the inside to the outside achieves diffusion-type flow guiding after fluid impact, and the limit in valve opening adjustment avoids valve damage or even sealing failure caused by over-travel opening; on the other hand, the real-time opening display during valve opening ensures that the operator can accurately adjust the valve opening; the combination of the two can effectively realize the adaptive adjustment of the butterfly valve opening and the protection of the sealing end during use.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A butterfly valve with limit adjustment function, comprising a valve body (1), characterized in that, A valve plate (4) is rotatably mounted inside the valve body (1). A guide groove (8) with a diameter and depth gradually decreasing from the inside to the outside is opened on the valve plate (4). A limiting mechanism is provided on one side of the valve body (1) corresponding to the valve plate (4). The limiting mechanism includes an adjusting seat (5) connected to the end of the inner wall of the valve body (1). A threaded seat (21) is installed in the middle of the adjusting seat (5). A limiting rod (6) that contacts the valve plate (4) is rotatably mounted in the middle of the threaded seat (21). At least four sealing rings (12) that contact the inner wall of the valve body (1) are installed on the outer periphery of the valve plate (4). A sealing column (15) that is interference-fitted with the inner wall of the valve body (1) is embedded in the outer ring side of the sealing rings (12).

2. The butterfly valve with limit adjustment function according to claim 1, characterized in that, A motor (2) is provided on the outside of the valve body (1) corresponding to the valve plate (4). A rotating shaft (20) is installed at the output end of the motor (2). The rotating shaft (20) extends into the valve body (1) and connects to the valve plate (4).

3. The butterfly valve with limit adjustment function according to claim 2, characterized in that, The rotating shaft (20) passes through one end of the valve body (1) and is connected to a follower rod (9). The valve body (1) is equipped with an indicator frame (3) on the outside of the follower rod (9). An indicator plate (7) is installed on the outer end of the indicator frame (3). A pendulum needle (18) that fits against the indicator plate (7) is sleeved on the outside of the follower rod (9). An indicator needle (19) facing the outside of the indicator plate (7) is installed at the front end of the pendulum needle (18). An angle line (16) is opened at the outer edge of the outer side of the indicator plate (7).

4. The butterfly valve with limit adjustment function according to claim 1, characterized in that, The adjusting seat (5) has a passage cavity (13) for fluid passage on the part corresponding to the threaded seat (21), and the adjusting seat (5) has guide platforms (22) on both sides of the lower end of the threaded seat (21).

5. The butterfly valve with limit adjustment function according to claim 4, characterized in that, The limiting rod (6) extends to the outer end of the threaded seat (21) and is fitted with an adjusting rod (11). The limiting rod (6) extends to the outside of the threaded seat (21) and is fitted with a locking ring (10). The inner end of the limiting rod (6) is rounded and contacts the valve plate (4).

6. The butterfly valve with limit adjustment function according to claim 3, characterized in that, The valve body (1) is fitted with a fixed seat (17) on the outer side of the follower rod (9) along the axial direction. The follower rod (9) is rotatably connected to the fixed seat (17).

7. The butterfly valve with limit adjustment function according to claim 1, characterized in that, The valve plate (4) has an annular groove (14) on its outer ring side. At least four sealing rings (12) are engaged with the annular groove (14) and connected end to end. The annular groove (14) is not connected to the guide groove (8).

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